Is that brown sandy (looks like brown sugar
) stuff dirt from where he pooped? Also, what's with the 2 colors? Not asking you, just noting it is odd.
I would get rid of rice - for puppies, I worry about them getting too bound up and playing too much with their GI systems, so I would use something like boiled/whipped yams/sweet potatoes and the chicken. They love it, you can add pumpkin to it if you want, and it doesn't bind, but does settle.
Could be parasites/worms, something like Giardia that's hard to find on a slide often. There are higher level poop tests
like the PCR that IDEXX does, as well as a regular fecal. There is also a GI blood test through Texas A/M that could diagnose something like ARD/SIBO, you can find out more about that here: Overview - EPI * Exocrine Pancreatic Insufficiency
Are there more pics of Comet somewhere?
I mean, his
is nice and all, but I love that mix.